NTRU is a public key cryptosystem that is considered unbreakable even with quantum computers.
Commonly used cryptosystems like RSA or ECC, on the other hand, will be broken if and when quantum computers become available.

In addition, NTRU is significantly faster than other public-key cryptosystems.
The following chart shows results for an Intel E2160 processor running at 1.8 GHz. The data was generated with the benchmark program that is included in the NTRU library.
Mouse over to switch between 32 and 64 bits:

NTRU consists of two algorithms: NTRUEncrypt for public-key encryption and NTRUSign for digital signatures.
Both algorithms use lattice-based cryptography.
For an in-depth description and cryptographic analysis please refer to the "Resources" section to the right.

Java source code and compiled jars are available on the download page.